How to watermark animated GIFs and combine 2 ImageMagick commands together? - windows

Question

I am on a Windows 7 machine using imagemagick from the command line.
The following code works to add watermarks to images:
composite \
-watermark 30% \
-gravity south \
the_watermark.png \
pic_to_be_watermaked.png \
watermark_completed.png
Problems are:
It doesn't work when I try to watermark an animated GIF
How to use this watermark command in conjunction with the command below?
This command takes all the PNGs inside the folder "static_images" and combines them into an animated GIF. It also makes sure that the image is 350px in width and the height is kept to the proper aspect ratio. It also gives the image some fuzz and sets the speed of the animation to 4 and makes sure it loops infinitely:
convert \
-resize 350x350 \
-fuzz 1.6% \
-delay 4 \
-loop 0 \
static_images/*.png \
-layers OptimizePlus \
-layers OptimizeTransparency \
animated_gif.gif
Questions:
How can I combine the watermark command with the one above?
How can I get the watermark commmand to work with animated GIFs?

Answer 1

Is this the result you'd like to see?
The trick is to watermark each PNG source file first, then create the GIF from the watermarked PNGs.
So it's the result of these two commands. First, create the watermarked PNGs:
for i in sample_images/000*.png; do
convert \
"${i}" \
sample_images/the_watermark.png \
-gravity south \
-composite \
sample_images/$(basename "${i}")_wm.png;
done
Note, I didn't use your exact composite command because it didn't create a readable watermark, only some blurring on the meant area...
Second, convert the watermarked PNGs to an animated GIF:
convert \
-resize 350x350 \
-fuzz 1.6% \
-delay 4 \
-loop 0 \
sample_images/*_wm.png \
-layers OptimizePlus \
-layers OptimizeTransparency \
animated_gif.gif
Is this what you meant to do?